About Prosser, Washington
Prosser (/ˈprɑːsər/) is a city in and the county seat of Benton County, Washington, United States, along the Yakima River with only one zip code 99350. The population was 5,714 at the 2010 census.
Prosser is located near the eastern end of the Yakima Valley at 46°12′25″N 119°45′56″W / 46.20694°N 119.76556°W / 46.20694; -119.76556 (46.206921, -119.765612). It is 665 ft above sea level. One river, the Yakima River, runs through it.
According to the United States Census Bureau, the city has a total area of 4.53 square miles (11.73 km2), of which, 4.49 square miles (11.63 km2) is land and 0.04...
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